.tm-chapter-nine-section {
  max-width: 980px;
  margin: 0 auto 2rem;
  padding: clamp(18px, 4vw, 40px);
  background: #fff;
  color: #333;
  line-height: 1.65;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,.05);
  overflow-wrap: anywhere;
}
.tm-chapter-nine-section h2.tm-section-title {
  text-align: center;
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  margin: 0 0 2rem;
  color: #2c3e50;
}
.tm-chapter-nine-section .tcolorbox {
  border: 1px solid #bdc3c7;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 25px;
  background-color: #f8f9fa;
  line-height: 2;
  box-shadow: 0 2px 4px rgba(0,0,0,.05);
}
.tm-chapter-nine-section .tcolorbox-red {
  border: 1px solid #e74c3c;
  border-radius: 0;
  padding: 20px;
  margin-bottom: 25px;
  background-color: #fdedec;
  line-height: 2;
}
.tm-chapter-nine-section ol { list-style: none !important; padding: 0; margin: 0; }
.tm-chapter-nine-section ol.level-1 { counter-reset: l1; }
.tm-chapter-nine-section ol.level-1 > li {
  counter-increment: l1;
  position: relative;
  padding-left: 2.1em;
  margin-bottom: 1.6em;
}
.tm-chapter-nine-section ol.level-1 > li::before {
  content: counter(l1) ". ";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 700;
  font-size: 1.05em;
}
.tm-chapter-nine-section ol.level-2 {
  counter-reset: l2;
  margin-top: .65em;
  display: block !important;
  grid-template-columns: none !important;
  width: auto !important;
}
.tm-chapter-nine-section ol.level-2 > li {
  counter-increment: l2;
  position: relative;
  display: block !important;
  width: auto !important;
  padding-left: 2.2em;
  margin-bottom: .8em;
}
.tm-chapter-nine-section ol.level-2 > li::before {
  content: "(" counter(l2, lower-alpha) ") ";
  position: absolute;
  left: 0;
  top: 0;
}
.tm-chapter-nine-section ol.level-3 {
  counter-reset: l3;
  margin-top: .65em;
}
.tm-chapter-nine-section ol.level-3 > li {
  counter-increment: l3;
  position: relative;
  padding-left: 2.4em;
  margin-bottom: .8em;
}
.tm-chapter-nine-section ol.level-3 > li::before {
  content: "(" counter(l3, lower-roman) ") ";
  position: absolute;
  left: 0;
  top: 0;
}
.tm-chapter-nine-section .math-block { margin: 15px 0 15px 20px; }
.tm-chapter-nine-section .bold-text { font-weight: 700; }
.tm-chapter-nine-section .preamble { margin: .5em 0; }
.tm-chapter-nine-section .flex-container { display: block; margin-top: 15px; }
.tm-chapter-nine-section .flex-item { min-width: 0; }
@media (max-width: 600px) {
  .tm-chapter-nine-section { padding: 16px; }
  .tm-chapter-nine-section ol.level-1 > li { padding-left: 1.8em; }
  .tm-chapter-nine-section ol.level-2 > li { padding-left: 2em; }
}